Kernel panic error seen on display with NVIDIA driver

nvidia_panic.txt

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff8172762b>] __down_common+0x4c/0x144
PGD 608b48067 PUD 60ba27067 PMD 0 
Oops: 0002 [#1] SMP 
Modules linked in: ath3k btusb bluetooth mxm_wmi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul ath9k glue_helper ablk_helper cryptd ath9k_common ath9k_hw joydev ath mac80211 serio_raw snd_hda_intel(+) rtsx_pci_ms lpc_ich(+) snd_seq_midi memstick cfg80211 snd_seq_midi_event snd_hda_codec snd_hwdep snd_rawmidi snd_pcm parport_pc snd_page_alloc snd_seq mei_me(+) mei ppdev snd_seq_device snd_timer snd nvidia(POX+) lp i915(+) parport video drm_kms_helper soundcore wmi drm mac_hid shpchp i2c_algo_bit hid_generic usbhid hid rtsx_pci_sdmmc ahci r8169 psmouse libahci mii rtsx_pci
CPU: 0 PID: 527 Comm: nvidia-persiste Tainted: P           OX 3.13.0-44-generic #73-Ubuntu
Hardware name: Notebook                         W35xSTQ_370ST             /W35xSTQ_370ST             , BIOS 4.6.5 11/13/2013
task: ffff8806090e9800 ti: ffff88060b4f8000 task.ti: ffff88060b4f8000
RIP: 0010:[<ffffffff8172762b>]  [<ffffffff8172762b>] __down_common+0x4c/0x144
RSP: 0018:ffff88060b4f9b48  EFLAGS: 00010096
RAX: 0000000000000000 RBX: ffffffffa089e3f0 RCX: 0000000000000000
RDX: ffffffffa089e3f8 RSI: ffff88060b4f9b50 RDI: ffffffffa089e3f0
RBP: ffff88060b4f9b98 R08: 0000000000000296 R09: ffffffffa060434b
R10: 0000000000000008 R11: ffffffffffffffb8 R12: 7fffffffffffffff
R13: ffff8806090e9800 R14: 0000000000000002 R15: 0000000000000000
FS:  00007f9503346740(0000) GS:ffff88062fa00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000060cdb0000 CR4: 00000000001407f0
Stack:
 ffff88060b4f9b68 ffffffffa089e3f8 0000000000000000 ffff88060c026d00
 0000000000000000 ffffffffa089e3f0 ffff88060ba18000 ffff880608904598
 0000000000000003 00000000000000ff ffff88060b4f9ba8 ffffffff81727740
Call Trace:
 [<ffffffff81727740>] __down+0x1d/0x1f
 [<ffffffff810b0c91>] down+0x41/0x50
 [<ffffffffa060462f>] nvidia_open+0x36f/0x850 [nvidia]
 [<ffffffffa0611d09>] nvidia_frontend_open+0x49/0xa0 [nvidia]
 [<ffffffff811c25cf>] chrdev_open+0x9f/0x1d0
 [<ffffffff811bb103>] do_dentry_open+0x233/0x2e0
 [<ffffffff811c2530>] ? cdev_put+0x30/0x30
 [<ffffffff811bb439>] vfs_open+0x49/0x50
 [<ffffffff811cc754>] do_last+0x564/0x1230
 [<ffffffff811ca7f1>] ? link_path_walk+0x71/0x870
 [<ffffffff81314d6b>] ? apparmor_file_alloc_security+0x5b/0x180
 [<ffffffff811cd4db>] path_openat+0xbb/0x650
 [<ffffffff811ce8da>] do_filp_open+0x3a/0x90
 [<ffffffff811db767>] ? __alloc_fd+0xa7/0x130
 [<ffffffff811bcf59>] do_sys_open+0x129/0x280
 [<ffffffff811bd0ce>] SyS_open+0x1e/0x20
 [<ffffffff8173186d>] system_call_fastpath+0x1a/0x1f
Code: 54 49 89 d4 48 8d 57 08 53 48 89 fb 48 83 e4 f0 48 83 ec 28 48 8b 47 10 48 8d 74 24 08 48 89 54 24 08 48 89 44 24 10 48 89 77 10 <48> 89 30 4c 89 f0 4c 89 6c 24 18 83 e0 01 c6 44 24 20 00 48 89 
RIP  [<ffffffff8172762b>] __down_common+0x4c/0x144
 RSP <ffff88060b4f9b48>
CR2: 0000000000000000